Starting Directory Opus will also start a copy of DOFSW.EXE. The DO script IndicateFolderChanges.vbs will communicate with DOFSW.EXE to tell it which folders to keep an eye on. DOFSW.EXE will call IndicateFolderChanges.vbs (via dopusrt.exe), which will cause any tabs looking at the folder to be prefixed with an asterisk.